Earth-penetrator pile



Patented July 22, 19st UNITED 1STJATESF "PATENT ounce LEON PIERCE, OF YORK, N; Y.

EARTI LPENETRATOR PI-LE Application filed septeinberjgl, i927 seria uo. 220,852.

The main obj eot of this invention is to pro-; .vide means for sinking shells into the SOlllIl which concreteis poured later. The main dlfliculty encountered in providing openings 1. in the soil to an appreciable depth sometimes amounting to thirty feet; is that the shell able it to retain its shape throughout the operation of sinking the shell and provide 1 ing the hole in which the shell .7 fits simul taneously.

Another object of this invention is to provide' a conical sinking element which pene trates the soil and forms the hole,'and has mounted thereon'the sleeve sections into:

which the concrete is to 'be'poured. "This penetrator elementis'constructed with a View to eliminating the greatest amountof'fric tion which exists between the shell and the a surface of the penetrator so that the latter may be conveniently extracted for the after operation of pouring the'cement WlthOUt'OllS- arranging these shells.

provide a penetrator which permits the use of a drop or steam hammer within the penetrator which is capablejof sinking the latter or extracting it accordingly as the throw of the hammer is adjusted.

The above and other'objects will become 1 apparent in the description below, in which characters of. reference'refer to like-named parts inthe drawlngs. I 7

Referring brlefiy to the drawing:

' vational view of the preferred form ofpenetra'tor with the shell mounted in place thereon and a drop hammer within its confines. i

Figure 2 is an exterior side elevational formed.

7 sired in the use of the device. These ridges Figure 1 is a longitudinal sectional eleto carry." These shells are formed of coupled view of Figure 1 with a portion of the shell removed therefrom.

Figure 3 isa side elevational View of the penetrator.

Figure 4 is atop plan viewof Figure 1. Figure 5 is across sectionalview through the'penetrator, taken online 5-5of Figure 4. Referring in detail to the drawing, the

numeral 35 indicates a conical structure which forms the body of the penetrator. This penetrator has a hemi-spheroid nose 11 at its lower. closed end which first penetrates the soil through which it "is to be forcedand the upper end is opena The'penetrator is of the simplest formand isprovidedwithlugs 12 at spaced-apart positions thereon.

A hollowbore 25 extends downwardly into the penetrator from its open end. This bore 25 is .preferabl cylindrical in shape and receives a drop ammer such as indicated by the numeral 26, which is suspended from a cable 27 and is "reciprocal in this bore. At the upper end of the penetrator a pair of diametrically opposite lugs 28 and 29 are are adapted to retain a header plate 30, which has tworecess'es 31 and 32,in place. The ,recesses 31 and 32 are'ofa dimension sufficient to' permit the passage of the lugs there- Still another object of this invention is to and canals are formed on the external surface of the penetrator "so that the greater amount of friction is eliminated between the penetrator and the shell sections which it is adapted These "lugs extend inwardly and shell and the penetrator except at various sections, such as indicated by the numerals 36, 37 and 38. The lowermost sectiomwhich encloses the tip of the penetrator, is more solidly built and more substantial than any of the other sections and has a helm-spherical nose 39and is termed the shoe. The remaining and successive sections are telescoped partly into each other, as indicated in Figure 1, and all of these sections are provided with encircling grooves 40 at spaced-apart positions along their entire length.

It is the purpose of this invention to provide a means of sinking a tapering shaft in the soil lining this shaft with sleeves and filling the resultant space after the penetrator has been extracted with cement for the purpose of piling. The ordinary skin or shell which is slipped over a penetrator element and is of annular construction causes an excessive amount of friction which occurs between the contacting surfaces of the sleeves and the surface of the. enetrator when the penetrator-is removed rom the shaft, and owing to this friction one or more sections of shell adhere to the penetrator and carried with it. This danger is completely eliminated by providing a free space between the positions where the shell remains in slight contact with the penetrator. This is 'accomplished by inwardlybending in semi-circular curves, portions of the material forming thereby groves 40 which encircle theshell sections as indicated. To further eliminate friction, the external surface of the penetrator has longitudinal ridges and canals 33 and'34 respectively formed thereon. These ridges and canals extend the greater length of the penetrator and lessen the contact thereby had between the shells and the penetrator to a greater extent. The header plate 30 closes the top of the bore in the penetrator and'has an opening formed axially therein through which a cable, such as 27, may be inserted. The cable is for the purpose of lifting a steam hammer when the latter'is to be used or for the purpose of suspending a drop hammer when that type is to be used. This header plate is located in position in the penetrator below the lugs 28 by passing the recesses in the header plate downwardly past the lugs 28 and then rotating the header plate a distance of 90. After being secured in this manner the header plate locks a steam or drop hammer in the bore 25 of the penetrator and also serves as an anvil for the drop hammer or steam hammer when the penetrator is to be extracted from the shaft it has formed.

prising a cone-shaped penetrator having a helm-spherical nose and a corrugated surface extending upwardly from a point above said nose, said penetrator having a cylindrical bore extending axially therein, a drop hammer reciprocal in said bore, a header plate having diametrically opposed recesses therein, means on said recesses for securing said header plate in position on said penetrator, and sleeve sections slipped over said penetrator adapted to be permanently sunk into a shaft formed by said penetrator.

2. A device for forming a pile shaft comprising a cone-shaped penetrator having a helm-spherical nose and a corrugated surface extending upwardly from a point above said nose, said penetrator having a bore extending axially therein, a drop hammer in said bore, a header plate having diametrically opposed recesses therein, diametrically opposed lugs on said penetrator abovesaid bore, said lugs engaging the upper surface of said header plate when thelatterhas been rotated, said header plate retaining said drop hammer in saidbore, so that the recesses therein are disaligned with the lugs for securing the header plate in position over the bore, the drop hammer being adaptedto contact with either the bottom of the bore or the header plate for extracting or urging downwardly the penetrator, and sleeve sections adapted to be slipped over said penetrator.

3. A device for forming a pile shaft comprising a cone-shaped penetrator having a hemi-spherical nose and a corrugated surface extending upwardly from a point above said nose, said penetrator having a bore extending axially therein, a drop hammer insaid bore, a header plate having diametrically oposed recesses therein, diametrically opposed ugs on said penetrator above said bore, said lugs engaging the upper surface of said header plate when the latter has been rotated, so that the recesses therein are disaligned with the lugs for securing the header plate in position over the bore, the drop adapted to contact with either the bottom of the bore or the header plate for extracting or urging downwardly the penetrator, said header plate serving as an anvil on the upstroke of said drop hammer, tapering sleeve sections slipped over said penetrator and connected end to end by means of a slip joint.

4. A device for forming a pile shaft comprising a cone-shaped penetrator having a hemispherical nose and a corrugated surface extending upwardly from a point above said trator above said bore, said lugs engaging the upper surface of said header plate when the latter has been rotated, so that the recesses hammer being lOO therein are disaligned with the lugs for se- Buring the header plate in-position over the bore, a drop hammer being adapted to contact with either the bottom of the bore or the header plate for extracting or urging downwardly the penetrator, tapering sleeve sections slipping over said penetrator and connected end to end by means of a slip joint, said sleeve sections being of larger diameter than the diameter of the penetrator, and spaced-apart annular encircling grooves on said sleeve sections, the base of said grooves seating upon the corrugated surface of said penetrator When said shells are being sunk into a shaft.

In testimony whereof, I alfix my signature.

LEON PIERCE. 

